Installation guide

– File owner
The inode contains the user and group identification numbers that
are associated with the owner of the file.
– Protection information
Protection information specifies read, write, and execute access for
the file owner, members of the group associated with the file, and
others. The protection information also includes other mode
information specified by the chmod command.
– Link count
A directory entry (link) consists of a name and the inumber (inode
number) that represents the file. The link count indicates the
number of directory entries that refer to the file. A file is deleted if
the link count is zero; the file’s inode is returned to the list of free
inodes, and its associated data blocks are returned to the free-block
list.
– Size of the file in bytes
– Last file access date
– Last file modification date
– Last inode modification date
– Pointers to data blocks
These pointers indicate the actual location of the data blocks on the
physical disk.
• Data blocks
Data blocks contain user data or system files.
7.1.4 File System and Directory Hierarchy
The standard Tru64 UNIX system directory hierarchy is set up for efficient
organization. It separates files by function and intended use. Effective use
of the file system includes placing command files in directories that are in
the normal search path as specified by the users’ .profile or .login file,
as appropriate. Figure 7–2 shows the major directories in the file system.
Not all of the directories in the Tru64 UNIX hierarchy are shown; you
should use those shown in Figure 7–2 to ensure that your product will be
portable to other systems. Some of the directories are actually symbolic
links.
7–8 Administering the UNIX File System